Removing a pattern from file names

Question

I have some files named as below:

e2ed150l145l245St01-Oxs_MinDriver-Magnetization-00-0002105.omf
e2ed150l145l250St01-Oxs_MinDriver-Magnetization-00-0002167.omf
e2ed150l145l255St01-Oxs_MinDriver-Magnetization-00-0001519.omf
e2ed150l145l260St01-Oxs_MinDriver-Magnetization-00-0001841.omf
e2ed150l145l265St01-Oxs_MinDriver-Magnetization-00-0002730.omf
e2ed150l145l270St01-Oxs_MinDriver-Magnetization-00-0002788.omf
e2ed150l145l275St01-Oxs_MinDriver-Magnetization-00-0001616.omf
e2ed150l150l250St01-Oxs_MinDriver-Magnetization-00-0002386.omf
e2ed150l150l2100St01-Oxs_MinDriver-Magnetization-00-0015577.omf

I want to rename them to:

e2ed150l145l245St01.omf
e2ed150l145l250St01.omf
e2ed150l145l255St01.omf
e2ed150l145l260St01.omf
e2ed150l145l265St01.omf
e2ed150l145l270St01.omf
e2ed150l145l275St01.omf
e2ed150l150l250St01.omf
e2ed150l150l2100St01.omf

Following some of the similar forums I used several commands including:

rename 's/-Oxs_MinDriver-Magnetization-00-[0-9]*//g' e2e*.omf -v

But it did not work. Please advise.

David C. Rankin · Accepted Answer · 2014-08-29 02:08:49Z

1

You can also use mv as well:

for i in e2e*.omf; do
    mv $i ${i%%-*}.omf
done

or

for i in e2e*.omf; do
    mv $i ${i//-*/}.omf
done

To collapse to a single line:

for i in e2e*.omf; do mv $i ${i%%-*}.omf; done

If the destination already exists use mv -f

answered Aug 29, 2014 at 2:08

David C. Rankin

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1 Comment

David C. Rankin Over a year ago

That is a part of parameter expansion being used for substring extraction. One of the most handy parts of bash. ${var##*x} means start at left and remove everything, up to and including, x. (use one # for just the first occurrence). ${var%%x*} is the same but start at the right. (note: how * changes position) Same note for one %. The second form ${var//x*/} is substring replacement. Here it says find x* and replace it with nothing. True form is ${var//x/y/}. With y being nothing -- the closing / is implied. HTH

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